World’s Thinnest Electric Generator
Piezoelectricity is a well-known effect in which stretching or compressing a material causes it to generate an electrical voltage (or the reverse, in which an applied voltage causes it to expand or contract). But for materials of only a few atomic thicknesses, no experimental observation of piezoelectricity has been made, until now. The observation reported today provides a new property for two-dimensional materials such as molybdenum disulfide, opening the potential for new types of mechanically controlled electronic devices.
Ultimately, Zhong Lin Wang notes, the research could lead to complete atomic-thick nanosystems that are self-powered by harvesting mechanical energy from the environment. This study also reveals the piezotronic effect in two-dimensional materials for the first time, which greatly expands the application of layered materials for human-machine interfacing, robotics, MEMS, and active flexible electronics.
An atomically thin material, molybdenum disulfide (MoS2), shown, could be the basis for unique electric generator and mechanosensation devices that are optically transparent, extremely light, and very bendable and stretchable.—Image courtesy of Rob Felt/Georgia Tech
Nature – Piezoelectricity of single-atomic-layer MoS2 for energy conversion and piezotronics
Source: http://nextbigfuture.com/2014/10/worlds-thinnest-electric-generator.html
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